$ ./check_substr.sh "This is a test string" "is a test" "This is a test string" contains "is a test" $ ./check_substr.sh "This is a test string" "isa test" "This is a test string" does not contain "isa test" $ ./check_substr.sh "This is a test string" "new string"...
/bin/bash string="Hello, World" if [[ $string == *Hello* ]]; then echo "The string contains 'Hello'" fi ``` 在上面的示例中,首先定义了一个字符串变量string,然后使用if语句判断该字符串是否包含“Hello”这个子字符串。如果包含,则输出提示信息。需要注意的是,在if语句中双括号“[[”和“]]”...
StringUtils.contains("abc", "a") = true StringUtils.contains("abc", "z") = false Parameters: str - the String to check, may be null searchStr - the String to find, may be null Returns: true if the String contains the search String, false if not or null string input In Bash 是否...
echo "String contains lowercase letters" else echo "String does not contain lowercase letters" fi ``` 这段代码将输出 "String contains lowercase letters",因为变量 str 中的字符串包含小写字母。 总的来说,Linux 中的 if 语句和字符串匹配是编写 Bash 脚本时基本的工具之一。通过合理的使用条件判断和字符...
(根据需求配置)" groupadd application useradd -m -s /bin/bash -c "application primary user" -g application app echo "root:${APPPASS}" | chpasswd log::info "[-] 强制用户在下次登录时更改密码 " chage -d 0 -m 0 -M 90 -W 15 root && passwd --expire root chage -d 0 -m 0 -M ...
OpenSUSE版本的官网下载:https://download.opensuse.org/distribution/leap/ 官网:https://www.linux.org/pages/download/ 下载选择示例: 1、进入官网下载地址 2、选择要下载的版本 3、 4、 5、 各个版本的区别,参考文章: https://blog.csdn.net/zl_StepByStep/article/details/77982553...
$ if [[ "Welcome to Baeldung" =~ [A-Z] ]]; then echo "String contains an uppercase letter" else echo "String does not contain an uppercase letter" fi String contains an uppercase letter. Here, we used theifconditional statement for matching a pre-defined stringWelcome to Baeldung. Ne...
二、测试工具 2.1 网络限速工具tc tc 是 Linux 中用于配置网络参数的命令行工具，通过它可以模拟不同...
[root@server-01 ~]# cut -f 1 /etc/passwdroot:x:0:0:root:/root:/bin/bashbin:x:1:1:bin:/bin:/sbin/nologindaemon:x:2:2:daemon:/sbin:/sbin/nologinadm:x:3:4:adm:/var/adm:/sbin/nologinlp:x:4:7:lp:/var/spool/lpd:/sbin/nologinsync:x:5:0:sync:/sbin:/bin/syncshutdown:...
[root@server-01 ~]# cut -f 1 /etc/passwd root:x:0:0:root:/root:/bin/bash bin:x:1:1:bin:/bin:/sbin/nologin daemon:x:2:2:daemon:/sbin:/sbin/nologin adm:x:3:4:adm:/var/adm:/sbin/nologin lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin sync:x:5:0:sync:/sbin:/bin/sync...